Several factors affecting charging speed 1. The output power of the charging adapter on your car should be greater than 20W. Otherwise, charging will be slow due to insufficient output power, so we recommend using a QC3.0 charging adapter. 2.Wireless charging usually has 70–85% efficiency due to energy lost as heat. 3. If you use your mobile phone during charging, it will also cause the charging speed to be slower 4.Qi Wireless charging wattage phone supports. iPhone Series（iphone13,iphone 14, iphone 15,iphone 16）: 7.5W; Google Series （Pixel 6 / Pixel 6 Pro）:10-15W; （[Pixel 7 / Pixel 7 Pro，Pixel 8 / Pixel 8 Pro，Pixel 9）:12-15W SamSung Series（Galaxy S20 / S20+ / S20 Ultra /S21 / S22 / S23 /S24）：Maximum 15W（Galaxy S21 / S22 / S23）：Maximum 15W 5 Example of Approximate Charging Time Calculation: You have a phone with a 4000 mAh battery and a 7.5W/10W/15W wireless charger with 80% efficiency.Charge your phone when not using it. Battery Capacity in Wh: 4000 mAh × 3.7V = 14,800 mWh；14,800 mWh ÷ 1000 = 14.8 Wh Effective Charging Power: Charger output = 7.5W；Efficiency = 80% (0.8)；Effective power = 7.5W × 0.8 = 6W；Charger output = 10W；Efficiency = 80% (0.8)；Effective power = 10W × 0.8 = 8W;Charger output = 15W；Efficiency = 80% (0.8)；Effective power = 15W × 0.8 = 12W； Charging Time(7.5W):14.8 Wh ÷ 6W = 2.47 hours；1.85 hours × 60 = ~148 minutes Charging Time(10W):14.8 Wh ÷ 8W = 1.85 hours；1.85 hours × 60 = ~111 minutes Charging Time(15W):14.8 Wh ÷ 12W = 1.23 hours；1.85 hours × 60 = ~74 minutes Multi-functional wireless charger mount 1.During the wireless charging process, electromagnetic field conversion will generate heat, causing the phone to heat up. Therefore, it is recommended that the charging stand be placed in a air vent, and do not use a case that is not conducive to heat dissipation to prevent overheating. 2.In order to ensure charging efficiency, the shorter the contact distance between the mobile phone and the charger, the better. If a mobile phone case is used, the thickness should be less than 4mm, and do not place other objects such as metal, bank cards, etc. in the mobile phone case, which will cause slow charging or failure to charge. Condition. 3. We use common vent hooks on the market, the max length of metal hook can be extended up to 32mm,it adapts to most air vents, if you're not sure whether your car air vent can be installed, you can pre-measure the length to avoid failure to install it. This cell phone car charger mount is suitable for Samsung/iPhone/Google and Qi-enabled mobile phones. Securely mount your smartphone in your vehicle's air vent and charge it simultaneously with fast wireless charging. the auto-clamping feature and free rotation allow for one-handed operation and optimal viewing angles. Overcharge protection safeguards your device from damage. hands-free use while driving. Enjoy the convenience of wireless charging and a secure phone mount in one sleek, compact design. Metal Vent Hook Reliable & Sturdy This car charger mount adapts to most air vents, the hook can be extended up to 32mm, the sturdy metal vent hook provides a firm hold, keeping your device securely mounted while driving and easily handle different road conditions, it's very reliable and sturdy. Easy To Install It's very easy to install into air vent according to installation steps, this charger mount keeps your phone charged and within reach for safe, the universal ball joint enables free rotation, ensuring your device stays in your line of sight. Elevate your commute with this versatile and convenient wireless charger mount. Compatible Phones and Charging Efficiency 15W LG V50, V40, V30, V30+, Q8, Q7.. 10W Samsung Galaxy S24 Ultra, S23+, S23, S22, S22+, S21, S21+ S20, S20 Ultra, S20 Plus, S10, S10 Plus, Note 10, 10 Plus, S10E, S9, S9 Plus, ...Google Pixel9,Pixel8,Pixel7 7.5W iPhone 15, 15 Pro, 15 Plus, 15 Pro Max, 14, 14 Pro, 14 Pro Max, 13, 13 Mini,13 Pro, 13 Pro Max, 12, 12 Pro, 12 Pro Max, 11, 11 Pro, 11 Pro Max, X, XS, 8... 5W Google Pixel 6,Pixel 4, Pixel 3 Others The charging wattage depends on the wireless charging capability supported by the Qi-Enabled phone.